Evaluate the following expression.
?
(sin2x - sin4x) cos x
?
A. cos4x sin2x
B. cos2x sin2x
C. cos2x sin6x
D. cos3x sin2x
E. cos x sin x
Answer: D
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Solve.A nuclear cooling tower cross section is a hyperbola having a diameter of 50 ft at the center. The distance between the two foci is 90 ft. What is the equation for the hyperbola?
A. 
- 
= 5
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Find the limit.
- 3
A. -4 B. 3 C. -3 D. -2
Solve the equation for x, where x is restricted to the given interval.y = -5 sin 8x, for x in 
A. x = 
arcsin 
B. x = 
arcsin 
C. x = 
arcsin 
D. x = - 
arcsin 
Use the maximum/minimum finder on a graphing calculator to determine the approximate location of all local extrema.f(x) = x4 - 4x3- 53x2 - 86x - 95
A. Approximate local maximum at 1.037; approximate local minima at -3.209 and 7.052 B. Approximate local maximum at -0.944; approximate local minima at -3.192 and 7.136 C. Approximate local maximum at 0.942; approximate local minima at -3.183 and 7.049 D. Approximate local maximum at 0.901; approximate local minima at -3.18 and 7.077